Atomizer for liquids



June 17, 1930., R ELSSSER l764,437

ATOMIZER FOR LIQUIDS Filed March 8, 1928 2 Sheets-Sheet l June 17, 1930.R. ELsssER n,75494137 ATOMIZER FOR LIQUIDS Filed March e, 192esheets-sheet 2 Eff i Patented June 17, 1930 y ROBERT LSASSER, 0FBERLIN-CHARLOTTENBURG, GERMANY, ASSIGNOR T0 SIEMENS-ASCHUCKERTWERKE'AKTIENGESELLSCHAFT, 0F BERLIN-SIEMENSSTADT, GERMANY,

A. COBPORATION'OF GERMANY ATOMIZER. FOR LIQUIDS l Application med Marchs, 192s, serial No;

My invention relatesto an atomizer for liquids.

Up to now the atomization of liquids was effected'by means of nozzleswith ver tine bores'through which the liquid is orcedl humidiiers,because the line bores in the nozzles soon become chokedup by depositsof substances dissolved in the water and I other'impurities, so that itis necessary to clean or replace the. `nozzles frequently. Suchatomizers or air' humidiiers require, furthermore, compressed air orsteam to ei'ect the atomization of the liquid, so that the first cost as4well asthe operation and maintenance costs are very high.y To eliminatethese disadvantages it has already been roposed yto equip atomiz'ers orair humidiers with revolving atomizing discs or wheels which throw theliquid into the air bycentrifugal force. In such atomizers a sulcientlyfine mist of liquid can not be obtained owing to the 10W speed ofrotation, even when fthe liquid is thrown against baiile plates by theydistributing disc and thus atomizedby the impact. A According 'to myinvention the liquid atomize'r or air humidifier consists substantiallyof'an atomizing disc driven byafmotor with 'vertical shaft', the liquid`entering the disc'a-t the hub-in a uniform thin layer and the dischavingSuche high circumerential speed, that'the liquidapplied toit is alreadybeforeleavingthe disc reduced to a fine state of division' and thusleaves they disc in the form of a fine mist. Preferably 40 the liquid'isuniformly and in athin layer supplied to the atomizer or sprayer disc bya distributorI disc which forms a storage basin and the edge of which isturned over in such la way that the overiowing thin layer of liquid runson to the atomizer disc 260,094, and in eermany Marc-his, 1927.

without impact. The liquid is preferably supplied to the atomizer orhumidifier through the hollow motor shaft, which is so designed that theliquid can issue at the lower end of the shaft only.Y

An embodiment oi my invention is by way of example illustrated `in thedrawings ailixed hereto and for-ming part of my specication.

In these drawings:

Fig. l, represents a sectional elevation of my improved Vatoinizelr' orhumidifier,

F ig. 2, a cross-section on an enlarged scale through the upper portionof the motor shaft, and

Fig. 3, a vertical section through a slightly modified construction ofatomizen Refer-ring to Fig. 1 of the drawings, 1 is the electricmotor,which maybe `for instance of the' three phase induction type andbe fed by an alternating current of comparatively high frequency andthus attain high speeds. lt is suspended vertically from an eye at thetop, so that itis free to set itself in the Vcorrect position. The motorshaft is provided with an axial bore'and carries at its lower end theatomizer disc 4, which is protected aglainst dust by a hood or guarddisc 5. The ranch 6 which serves for connecting the apparatus with watermains or any other supply ofl water is at its inner end curved downwardsand terminates, as Fig. 2 'shows .in section, kinto a bore'3 at theupper end ofthe shaft 2. Thel waterv issues from the" shaft4 2 throughthe horizontal or transverse bore 7. It accumulates in the distributor 8forming a small basin-or dish` and overflows 'adjacent toH the shaft ina line layer uniformly and without impact on to the atomizer disc orwheel 4. Below this atomizer disc4fis mounted a fan, propeller or bladewheel l0, by means of the screw ll. lt consists o 'a consiclerablenumber, say six or more small blades, and may be of various designs.Preferably it will be punched out of a sin le disc of sheet iron withthe blades pitche in a suitable manner.

Owing to the high velocity of the atomizer disc the water is distributedas an extremely thin layer and leaves the edge of the atomizer disc inthe form of a ver fine mist, the atomized water being distri uted over alarge area, since' a vi orous iiow of air is set u underneath the isc bythe fan.l

It is essential that the water is conveyed on to the atomized disc inthe vicinity of the shaft in a thin and uniform layer and without any imact or axial thust, since only in this way it is possible to obtain auniform distribution of the water. To prevent the dish formed by theatomizer disc from filling up with water, by reason of the motor havingstopped owing to the failure of the current, dri holes 9 are providedadjacent to the sha through which holes the inlowing water drains awaywhen the disc stops. A warning is thus given to shut ofi' the watersupply to the atomizer.

For driving my improved atomizer, small three-phase motors arearticularly suitable, which are preferabl i) comparativel high requencyfrom a threephase networ across a small f uency convertor. Such motorshave a very low power requirement only and small dimensions, so that theatomizer maybe of small dimension, requiring ve little space.

A particularly simple compact and inexnsive construction is attained, ifthe drivlng motor is designed as so-called built-in motor in the mannerof the small motors used in vacuum cleaners and the like, and enclosedby a'ca Fig. 3 of e drawing illustrates .an atomizer, equipped with sucha motor. The electric motor 11 constructed as built-in commutator motorfor direct and alternating current and which is capable of develo ing ahigh speed, is suspended from an eyeolt 18 screwed into the u perbearing shield 12. At the lower end o the motor shaft 14 is mounted thedistributor 15, as' well. as the atomizer disc 16. The motor 11 isenclosed by a sheet-iron cap or bell 17 provided at its lower open endwith4 al protective hood 18 for'the .atomizer disc 16. Between the cap17 and the motor 11 there are provided rubber rings 19 and 20 which actas silencers so that the atomizer may also be employed in rooms in whichunnecessary noises must be avoided such as theaters, inrmares and so on.lelow the disc 16 vis provided the fan 21 which consists of a pluralitpunche out of a sheet-iron lank. v

The li uid is su plied to the atomizer by a pipe attach to the cap 17and o ening into the distributor 15. The liquid ows uniformly over theedile of the distributor ed with current ofr -cover said atomizer disc,a supplyl of blades of ,sli ht inclinationv in a fine film and smoothlon to the atomizer disc 16. Close to t e shaft 14 there are rovided driholes 23 in the disc 16 through) disc 16 is arrested.

Atomizers, humidifiers or sprayers according to my invention areparticularly valuab e for industrial enterprises, such as textile millsor tobacco factories, in which the air should always contain a certainpercentage of humidity. The presence of dust or fluff inherent in suchfactories does not interfere with the satisfactory 4operation of themachine, since it does not we any fine openings liable to be clogge up.

-The atomizer is suitable oratomi liquids of any kind. Besides water,scente liquids, disinfectants and the like ma be atomized. In such acase the branch o the suppl pipe will preferably be connected to a tancontaining the liquids in question.

Various modifications and changes may be made without departing from thes irit and the scope of the invention, and desire, therefore, that onlysuch limitations shall be placedthereon as are imposed by the prior art.

I claim as my invention: 1.- lIn an atomizer for li nids, incombination, an atomizer disc, an e ectric motor with vertical shaft adated to drive said atomizer disc, a protective ood adapted to cover saidatomizer disc, a supply conduit for the liquid terminating near thecenter of said atomizer disc and adapted to feed the liqliid to saidlatomizer disc in a uniform t in layer, a distributor disc mounted on thewhich the iquid issues when the motor shaft and forming a collectingbasin for the liquid and a bent-over flange on said distributor discadapted to conduct the liquid upon said atomizer disc smoothly andwithout impact.

2. In an atomizer for liquids, inl combination, an atomizer disc, anelectric motor with vertical shaft adapted to drive said atomizer disc,a protective hood adapted to conduit for the liquid terminating near t ecenter of said atomizer disc and adapted to'feed the li uid to saidatomizer disc in a uniform thin layer, a distributor disc mounted on themotor shaft and forming n. collecting basin for the li uid, a bent-overange on said distributor isc adapted to conduct the li uid upon saidatomizer disc smoothly'and without impact, and a ro ller wheel mountedupon the motor s a t underneath said atomizer disc.

3. In an atomizer for liquids, in combination, an atomizer disc, anelectric motor with vertical shaft adapted to drive said disc and'consistingv of a built-'in motor a cap enclosing said motor, elasticmeans lietween said ca and said motor adapted to ,silence the noise madeby said motor, a proiis lo atomizer tective hood covering said atomizerdisc, a. supply conduit for the liquid terminating near the' center ofsaid atomizer disc and adapted to supply the liquid to said disc in auniform Athin layer, a distributor disc forming a collecting basin forthe liquid mounted upon the motor shaft, a bent-over edge on saiddistributor disc adapted to conduct the li uid Without impact on to said'sc`, andy a pro eller. wheel mounted upon the motor sha t underneathsaid atomzer disc. p In testimony whereof I aflx my signature.A

7.. 'ROBERT ELSSSER.

